Improved machine foe coiling springs



J. W. EVANS. MACHINE FOR MAKING SPIRAL SPRINGS.

No. 69.421, Patented Oct. 1. 1867.

gotten" giants 323mm @ffire.

JA MES W, EV ANS, O 1* N .l lW Y-O RK, N. Y.

Lrttere Patent N 69,421, iZali'iZ (Mn/Jar 1, 180i.

clgi fitlgrbuli march in in llj'tit ittius 331mm znn mating and iii tip sum.

TO ALL WHOM IT MAY CONCERN:

lie it known that I, JAMES W. EVANS, of the city, county, and State of New York, have invented a certain new and useful improvement on-Machines for Manufacturing Spiral Springs, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing, forming part of this specification, and in whiehn Figurel represents a side elevation of a machine for making spiral springs, (foiist-ructcd according to my improvement-i Figure .3 a plan of the same, and

Figure 3 a transversc'section through the line X X in figs. 1 and 2.

Like letters indicate like parts throughout thevseveral figures.

The nature of my invention, which relates to the manufacture of railroad-car and other spiral springs from rod or wire, consists in a novel combination of a revolving mandrel, on which the wire is wound, with arotating spirally grooved cylinder or roll for directing the wire in'a uniform manner to its wrap on the mandrel, and securing to it a'close ling on the latter at any desired pitch; also, said invention further consists in a novel combination of sliding mandrel and locking attachment for holding the wire in producing the wrap, and for detaching the coiled spring when formed,

Referring to the accompanying drawing, A represents the bed of the machine, and B B standards for supporting a rotating mandrehshaft, C, which carries fast and loose pulleys'D E, and is made capable of sliding longitudinally by it may he, means of a leven lflloclcing, when said shaft is moved to its extreme forward. position, in a spring-catch, G. The shaft C also is or may be provided with a hand-turning wheel, H, for adjusiingiit circumferentially to establish the lock of the wire on the mandrel, as hereinafter described. Fitted to the inner end of the shaft C, so as to rotate with it, and form, as it were, an extension of it, is a mandrel or mandrel-rod, I, preferably made detaehable,.for the substitution, when required, of a mandrel of difi'erent diameter or length, or both, according to the sized core and length of the spring to be made. The connection of the mandrel I with the shaft 0 may be through a box or swell, a, fitted with a rocking-dog or lever, 1 operated by a screw, r, and projecting through the inner end or face of said box, to establish a locking grip or hold on the wire to the mandrel at its one end, where is arranged a spiral collar, d, to guide the wire to the dog. J J are standards arranged at any suitable distance apart, and the enter one, J, of which, is preferably made adjustable 0n the bed in which it rests, to vary the distance apart of said standards to adaptthe machine to the production of different lengths of springs. This outer standardJ forms hearings to pinionsc 0, having socket or clutch-box constructed shafts ff, into one of which the outer end of the mandrel I fits, and with which it gears so as to rotate the one pinion that in its turn gives motion to the other pinion, the socket of which has gearing with ita spirally-grooved cylinder or roll, K, arranged parallel to the mandrel, and rotating in close relationship thereto by its support in the socket of the pinion with which it gears, and in a bearing in the standard J, through which the mandrelconnecting box it also fits. This spirally-grooved cylinder or roll K guides the wire to its proper wrap on the mandrel, and should be made detachable, so as to substitute others of different diameter, pitch, or length, according to the size or pitch of the spring required to be made. Where the Gollqd spring to be produced is of a tapering or conical form, instead of straight, then thc mandrel and spirally-grooved guiding-roll should be shaped accordingly.

To manufacture a spring by this, my improvement, supposing the mandrel I to be slid forward to the position represented for it in fig. 1, and its shaft C turned by the hand-wheel H, so as to bring the dog b in line with or under a notch, 8, in the roll K, so that said dog may he opened by the screw 0 to receive-in grip the end of the wire guided to it orer a rest or bar, In, and by the spiral collar d; then, on giving motion to the mandrel shaft, and through gear described, to the spirally-grooved roll; the wire, heated, it may be, to any required degree, is wrapped on the mandrel, its twist and close hug of the same being regulated by the spirally-groovedguiding-roll K, which gives to the spring so formed a uniform spiral construction of a compact and firm character. When the wire has been wound on the mandrel the required length, which may be the length of the mandrel or less, the dog 6 is released by suitably turning the screw 0 from its grip on the end of the wire, when, by, drawing the mandrel back, as represented in fig. 2, the spring is shoved or drops off the mandrel, and the machine, on adjusting the mandrel and its locking-(log of a fresh spring.

Whnt I claim as my invention, will desire tosocnre by Letters Patent, is-

1. The revoli'ing maniliel I, mnrlo capable of n sli l with the spirallygroovcd roll K, and scrving to lllncl 2. In combination with the sliding and revolving mnn 'li'el T, the griping-ilng I, :unl spirnl guiding-collar (Z.

for operntiun on the Wll C of which the spring is forum] substantially as specified.

'ilhc sliding nnil i-m'nlving mandrel I with its locking-(log I; and band-wheel, c1 ccmleinntien with the spii'nllv-groovcd rotnting roll K, having formed in it a recess or heroin set forth. i

, as hereinbefore described, is really for the manufacture ing motion in direction of its length, in combination iis equivnlcnt, II, in notch. s, c,

clitinll as JAMES W. EVANS Witnesses:

JNo HALDEMAN, F. W. Fmzom.

l the spring when fui'mc l, essentially as herein set fertili- 

